DIsc brake, drum brake swap.
Posted in the Ural Motorcycle Forum
Saint Louis, MO
#1 Jul 12, 2010
I would like to buy a late model 750 Ural with sidecar. But I want to swap the entire front disc brake system for an earlier brake system so that I can use the spare on the front. I can probably find someone willing to make the swap, so that I don't ahve to buy all the necessary parts new. But my question is about mechanical compatibility.
In other words, how readily can this swap be performed? Are the forks the same?
#2 Mar 23, 2011
I believe if you buy the 06 and earlier Ural with disc brakes, it uses the same fork as the early drum brake units.
I know some guys out there are doing this modification, for me, I like the bembro disc brakes stopping power over the drum.
#3 Apr 25, 2011
We (wife and I) have a 2008 Ural Patrol with Brembo
brake. We also have several BMW vintage and newer bikes with a variety of brakes. Our vintage BMW sidecar rig is drum brake equipped.
55 years of riding has convinced me that ABS disc brakes are the best safety change ever.
We ride the drum brake bikes regularly and enjoy them greatly. We ride them locally and cross country. Even so, there is no doubt that discs are better and much safer.
Though we like the concept of total interchangability, the Brembo on the Ural is much better than the drum on the BMW.
We also have a trailer made from a Ural sidecar equipped with standard Ural wheels; no brakes. On those occassions when we attach the Ural trailer or our small boat trailor, we really appreciate the disc and wish we had them in each corner.
We have considered the spare tire mount extension to allow a second, disc equipped, wheel as a spare for the front.
We urge you not to replace a superior brake with a less effective option.
When Ural puts Brembos on all wheels I suspect we will trade up.
#4 May 21, 2011
I agree with Aardvark.
#5 Jun 18, 2011
I am looking to go the other way. I want to swap out my drums for discs all around.
Since: Dec 10
Saint Louis, MO
#6 Jun 22, 2011
I doubt you're going to be able to do that for anything like a price you'll want to pay. For one thing, the rear swing arm is not wide enough to accommodate the wheel-hub and the brake-rotor. Remember the brake drum is an integral part of the hub now, but a rotor would be installed next to the hub requiring a much wider swing arm. Then the stock exhaust wouldn't fit anymore and there would be all kinds of other issues.
For another thing, you'd have to figure a way to proportion braking power between the rear wheel and the sidecar wheel. Just using a two-hole banjo bolt and running a brake line over to the sidecar caliper will not do.
Too much power to the sidecar brake will cause the rig to veer to the right every time the rear brake is applied. You could, however, get by with no sidecar brake at all; currently on one of my rigs (non-Ural) I don't have a brake line going to the sidecar and it hasn't caused any handling problems.
Let us know how this works out for you.
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